Door lock



N. B. HURD DOOR LOCK Original Filed March 18, 1922 wmmmmmmr T Fics.

NORMAN B. HURD, E NEW BRITAIN, CO'NNECTIC'UT, ASSIGNOR T0 THE AIMERICANr HARDWARE CORPORATION, OF NEW BRITAIN, CONNECTICUT, A CORPORATION OF CONNECTICUT. l

DOOR LOCK. Y

Application led March 18d, 1922, Serial No. 544,845. Renewed September 11, 1924.

To all 'whom t may conce/m:

' Be it known that I, NORMAN B11-Imm, a citizen of the United States of America, residing at New Britain, Hartford County,

Conn., have invented a new and useful Door Lock, of which-the following is a specifica tion.

My invention relates to improvements in locks particularly useful as applied to automobile doors.

One of the objects is to provide means whereby the latch bolt will effectively perform its regular function o f locking the door and will also operate to take up any loose play in the door and thereby prevent rattle. Other features include means for dogging the latch against accidental or unintentional retraction. Other means provide for ease of operation and certainty of action. In the drawings: c Fig. l is a side view of the lock case partly broken awayto show the internal mechanism. f

Fig.. 2 is a section on the line 2 2 of Fig. 1.

, Fig. 3 is an end view of certain parts. Fig. 4 is a plan View ofcertain parts. Figure 5 is a detail plan view of a portion of the lock, showing the latch retracted.

Fig. 6 is a section on the line .6 6 of Fig. A

1 represents the lock case.

2 represents the face plate through' which projects the bolt head, while 4 represents the latch bolt tail. 5 is a latch actuator pivotally mounted at 6 in the face plate 2. As shown, the actuator swings in a slot in the latch bolt head. The actuatorhas a slot 7 through which passes a pin 8 carried by head 3. 9 is a spring employed to normally impel the latch bolt forwardly. 10 is a handle arranged to retract the latch bolt by hand from the 'ndoor side b of the lock. The out door side f the lock is provided with a handle (not shown) which operates a roll-back 11. 12 is a cam shoulder on the latch bolt just back of the face plate 2 and arranged to coact with a shoulder 14 for the purpose hereinafter described. 15 represents a 'bevel or incline on -Inovement, the lateral a nose 23? corresponds generally tothe cam 12 but is located forwardly of the same-.as best seen in Fig. 5. By comparing Figs. 2 and 5 it will be seen that the latch bolt head partakes of not. only a longitudinal but a lateral movement occurring at the end of the outward movement for the purpose of crowding the door tightly against the casing when it is closed so that it will not rattle, assuming the door to which the lock is applied is closing. When the door is'nearly closed the actuator 5 will encounter the strike plate (indicated in dotted lines, Fig. 2), and will swing back thereby repressing the repressing movement of the latchA brings the incline 15 against the edge of the latch passage in the face plate so that continued rearward movement will cause the latch to swing laterally into the position 'indicated in Fig. 5. The moment the end of the latch clears the edge of the keeper slot in the strike plate it will be impelled forwardly bythe spring 9. On the last part of the forward movement the cam or inclne 12 will encounter the shoulder 14 and force the latch bolt head `laterally against the inside of the keeper in .and hold it against rattling.

16 is a dogging device pivoted at 17 and having a nose 18 arranged to lock into either of the notches 19-19 on the latchbolt tail. 20 is a pin whichlis mounted transversely in the lock case, the end of the pin projecting through near the edge of the face plate so as to strike against the door casing when the door is closed and to be repressed thereby. 21 is a cam on the pin 20, which cam lifts and frees the dog 16 when the door is open. Wllenhowever the door is closed the cam 21 is withdrawn from-the dog which latter. is moved into the dogging position, preferably y a spring 22. 23 is a sliding latch retractor mounted within the case. This slide has for\engagement by the roll-back 24 operated by handle 10. The slide also has a nose 25 which engages a shoulder26 on the tail ofthe latch bolt. 27 is a pin on the slide :23 which engages a shoulder 28 on the dog 16 to free the latter from the latch .the abrupt Side @fthe latch boit. l'rhisbevel j latch. A very slight when the slide 23 is drawn back. The outside operated roll-back 11 engages a shoulder 29 on the slide 23 whereby the latch may be retracted from the outside.

, When the lock is to be a plied to the door of a closed car, I preferab y provide a suitable (logging device whereby the outside roll-back may be dogged. For example, 30 represents a roll-back operated by a suitable inside thumb turn or the like.` This rollback has an arm or shoulder 31 arranged to i engage a shoulder 32 on the roll-back 11 when the parts are positionedas shown in Fig. l thereby preventing anyone from operating the lock from the outside. As shown, the end of spring 32 frictionally holds the roll-back 30 in the on and 0E position., Obviously, the roll-back 30 may be thrown back so as to free the outside rollback 11.

It willbe noted that bythe pin and slot connection between the actuator and the latch bolt head I am enabled to not only transform the swinging movement ofY the actuator into a rectilinear movement of the latch, but said 4slot aiords adequate clearance to permit the latch bolt head to partake tightly that -it cannot be crowded by the.

latch bolt head to' a degree which allows the latch 'to be fully projected, the said dog may still engage the latch by dropping into the said second notch.

What I claim is:

l. A lock comprising, a case, a spring projected reciprocating latch bolt mounted therein and including a head portion adapted to project from said case, with means operating to impart a bodily lateral movement to the outer end of said bolt on the last part of its outward reciprocating movement and the first part of its rearward reciprocating movement, a (logging device for locking said latch in its projected position against unintentional repression, with manually operable means for casting oli said (loggingA devic and retracting said latch.

2. In a lock, a case, a spring projected latch bolt projecting through the edge of said case, a vlatch actuator pivoted to said case and coacting with said latch to repress the same when said actuator encounters a strike plate and is swung thereby, means for imparting a bodily lateral movement to the outer end of said latch bolt on th'e last part of its outwardreciprocation and the irst part of its inward reciprocation.

3. In alock, a case, a latch member mount-v head in a direction to crowd the door into its closed. position to prevent rattling, a latch dog for holding the latch against unintentional repression, said manually operable retracting device coacting with said dog to release the latch to permit it to be retracted.

NORMAN B. IIURD. 

